package com.xinkao.example.config.shiro;

import com.xinkao.example.util.constants.Constants;
import org.apache.commons.lang3.StringUtils;
import org.apache.shiro.web.servlet.ShiroHttpServletRequest;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.apache.shiro.web.util.WebUtils;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.Serializable;

/**
 * @author LXF
 * @Description shiro 重写sessionid
 * @createTime 2021年02月07日 14:31:00
 */
public class StatelessSessionManager extends DefaultWebSessionManager {
    /**
     * 这个是客户端请求给服务端带的header
     */
    private static final String REFERENCED_SESSION_ID_SOURCE = "Stateless request";

    /**
     * 重写getSessionId,分析请求头中的指定参数，做用户凭证sessionId
     */
    @Override
    protected Serializable getSessionId(ServletRequest request, ServletResponse response){
        String id = WebUtils.toHttp(request).getHeader(Constants.AUTH);
        if(StringUtils.isEmpty(id)){
            //如果没有携带id参数则按照父类的方式在cookie进行获取
            return super.getSessionId(request, response);
        }else{
            //如果请求头中有 authToken 则其值为sessionId
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE,REFERENCED_SESSION_ID_SOURCE);
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID,id);
            request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_IS_VALID,Boolean.TRUE);
            return id;
        }
    }
}
